Mirshahi Alireza, A Ponto Katharina
Dardenne Eye Hospital, Bonn, Germany.
Department of Ophthalmology, University Medical Center Mainz, Germany.
J Ophthalmic Vis Res. 2019 Jul 18;14(3):251-256. doi: 10.18502/jovr.v14i3.4780. eCollection 2019 Jul-Sep.
To study the potential changes in pupil area within low-energy femtosecond-laser assisted cataract surgery (FLACS).
A retrospective assessment of the pupil size was performed in the eyes undergoing FLACS using the Ziemer LDV Z8. We measured the pupil diameters as part of the images taken preoperatively and at the completion of laser pretreatment (after releasing the suction). We calculated the pupil area in 40 eyes of 40 patients (14 right and 26 left eyes). The mean standard deviation (SD) of age of the patients was 74 7.4 years (range: 51-87). Paired -test was used for statistical analyses. Subgroups were built with reference to age and preoperative pupil area (smaller than or equal to the median versus larger than the median).
The mean SD axial length, anterior chamber depth, white-to-white distance and lens thickness were 24.01 1.47, 3.23 0.4, 11.97 0.49, and 4.59 0.41 mm, respectively. The mean SD pupil area was 39.33 7.1 mm preoperatively and 39.3 6.75 mm after laser pretreatment. The mean SD change in pupil area was -0.03 2.12 mm . There were no statistically significant changes between preoperative and post-laser pupil areas ( = 0.93, 95% CI: -0.71 to 0.65). Comparisons within subgroups also did not detect pupil area reduction.
This study did not detect statistically significant changes in pupil area after laser pretreatment using low-energy FLACS. This observation is in contrast to previous studies using other laser platforms.
研究低能量飞秒激光辅助白内障手术（FLACS）过程中瞳孔面积的潜在变化。
对接受使用Ziemer LDV Z8的FLACS手术的眼睛进行瞳孔大小的回顾性评估。我们测量术前及激光预处理完成时（释放负压后）所拍摄图像中的瞳孔直径。我们计算了40例患者40只眼（14只右眼和26只左眼）的瞳孔面积。患者的平均年龄标准差为74±7.4岁（范围：51 - 87岁）。采用配对t检验进行统计分析。根据年龄和术前瞳孔面积（小于或等于中位数与大于中位数）构建亚组。
平均±标准差的眼轴长度、前房深度、角膜横径和晶状体厚度分别为24.01±1.47、3.23±0.4、11.97±0.49和4.59±0.41mm。术前平均±标准差的瞳孔面积为39.33±7.1mm²，激光预处理后为39.3±6.75mm²。瞳孔面积的平均±标准差变化为 - 0.03±2.12mm²。术前和激光后瞳孔面积之间无统计学显著变化（P = 0.93，95%CI： - 0.71至0.65）。亚组内比较也未检测到瞳孔面积减小。
本研究未检测到使用低能量FLACS进行激光预处理后瞳孔面积有统计学显著变化。这一观察结果与先前使用其他激光平台的研究结果相反。
